Chiral charge pumping in graphene deposited on a magnetic insulator
Artikel i vetenskaplig tidskrift, 2017

We demonstrate experimentally that a sizable chiral charge pumping can be achieved at room temperature in graphene/yttrium iron garnet (YIG) bilayer systems. The effect, which cannot be attributed to the ordinary spin pumping, reveals itself in the creation of a dc electric field/voltage in graphene as a response to the dynamic magnetic excitations (spin waves) in an adjacent out-of-plane magnetized YIG film. We show that the induced voltage changes its sign when the orientation of the static magnetization is reversed, clearly indicating the broken mirror reflection symmetry about the planes normal to the graphene/YIG interface. The strength of effect shows a nonmonotonous dependence on the spin-wave frequency, in agreement with the proposed theoretical model.

films

ferromagnetic metal

magnons

Författare

M. Evelt

Westfalische Wilhelms-Universitat Munster

H. Ochoa

University of California, Los Angeles

O. Dzyapko

Westfalische Wilhelms-Universitat Munster

V. E. Demidov

Westfalische Wilhelms-Universitat Munster

Avgust Yurgens

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Jie Sun

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Y. Tserkovnyak

University of California, Los Angeles

V. Bessonov

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences

A. B. Rinkevich

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences

S. O. Demokritov

Westfalische Wilhelms-Universitat Munster

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 95 Article number 024408- 024408

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik

Drivkrafter

Hållbar utveckling

Ämneskategorier

Fysik

Nanoteknik

Fundament

Grundläggande vetenskaper

Infrastruktur

Nanotekniklaboratoriet

DOI

10.1103/PhysRevB.95.024408